Cap for a highlighter



FIG. 1 is a right side perspective view taken from the side and above showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view, the left side elevational view being a mirror image thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines showing a barrel of a highlighter are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a “cap for a highlighter”, as shown and described. 